Перегляд архіву субота, 16 листопада 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Nov 16 1235 UTC

SIDC Forecast

Сонячні спалахи

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Сонячні протони

Quiet

	10cm flux	Ap
16 Nov 2019	070	007
17 Nov 2019	070	018
18 Nov 2019	070	012

Bulletin

The solar activity has been at very low levels over the past 24 hours. The Sun is currently spotless and the X-ray flux remains below B-level. Solar activity is expected to remain at low levels for the next 24 hours.

No earth-directed coronal mass ejections (CMEs) have been observed in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

The solar wind parameters were mostly at nominal values. On Nov 16, a minor enhancement of the solar wind environment was observed starting around 18:00 UT. This enhancement can be associated with the sector bordering crossing announcing the soon arrival of the expected coronal hole influence. The total magnetic field reached 7 nT around 19:30, the solar wind speed went up to 400 km/s, and the southern component of the magnetic filed fluctuated between -5.7 nT and 5 nT. The solar wind parameters are expected to return close to the nominal values for a short period of a few hours. Then we expect new enhancements of the solar wind parameters to start later today on Nov 16 or early 17 due to the influence of the negative polarity coronal hole high-speed streams, which has reached the central meridian on Nov 13.

Quiet geomagnetic conditions were observed over the past 24 hours. It is expected to remain so for a short period of a few hours until the arrival of influence due to the high-speed stream coming from the coronal hole later in Nov 16-17 were more active conditions are expected.

Today's estimated international sunspot number (ISN): 000, based on 14 stations.

Solar indices for 15 Nov 2019

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	007
AK Wingst	///
Estimated Ap	003
Estimated international sunspot number	000 - Based on 12 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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